Am a veteran and got ReSound Linx 2 9 ITC from Denver VAMC. I will say that they seem (when properly setup) clearer than Phonak aids so far. However, seems to be some issue with getting them setup correctly (not sure if the aids are the problem or the audiologist's unfamiliarity). She is using the latest program version and firmware version.
I had a distortion or digital clipping noise in both ears, still have a bit in the right one, she was able to minimize, but, seems that my high frequencies were a bit attenuated. Don't think this is a physical problem with the aids, but, not sure what it was (transient noises or bells or dings sounded like static or clipped).
I tried both the app and no app, and agree with others, while the app is nice, and I can use it with my watch (iPhone 6s+ and watch, both with latest iOS versions), it's majorly flaky--streaming is usually not clean, and if I turn my head to left or right, the aid furthest away drops out (more on that). The ganged volume controls keep un-ganging into separate ones.
I have been back to have them adjusted three times, each time audiologist had to call ReSound to help her, last time when she mentioned the aid dropping out when I turned my head, and that they didn't sync with each other (mode and volume adjusted in one aid also adjusts in the other), she burst out laughing. Seems they told her that some people have fat heads or lots of water, so that the signal attenuates and they can't talk to each other (FIRST time synced aids I've used couldn't). Due to that and other issues, she is getting me the BTE with the larger battery and antenna, to see if that works better.
I think this is a good start, but, just not ready for prime time, and evidently more training of audiologists, and more honesty of ReSound (the battery or attenuations issues with ITC models) is needed to avoid these issues.